This class implements a non-persistant MeasureCollectionSerice. This means
that this measure collector service is not backed by any database or file
system. All the collected measurements are only stored in the memory. The
cacheSize determines the maximum number of MeasureIDs, which are stored. If
the no of MeasureIDs, exceeds the cacheSize all MeasureItems belonging to one
MeasureId will be removed. This MeasureId for removal is chosen by a
least-recently-used strategy.